61477172371 has 4 divisors (see below), whose sum is σ = 61584838744. Its totient is φ = 61369506000.

The previous prime is 61477172359. The next prime is 61477172401. The reversal of 61477172371 is 17327177416.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61477172371 - 2¹³ = 61477164179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61477172671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53832330 + ... + 53833471.

It is an arithmetic number, because the mean of its divisors is an integer number (15396209686).

Almost surely, 2^61477172371 is an apocalyptic number.

61477172371 is a deficient number, since it is larger than the sum of its proper divisors (107666373).

61477172371 is a wasteful number, since it uses less digits than its factorization.

61477172371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107666372.

The product of its digits is 345744, while the sum is 46.

The spelling of 61477172371 in words is "sixty-one billion, four hundred seventy-seven million, one hundred seventy-two thousand, three hundred seventy-one".